Stop mechanism



Dec. 20, 1927.

v 1,653,076 c.. c. WILSON STOP MECIHANIVSM Filed DecQZZ, {192 s Sheets-Sheet 1 Dec. 20, 1927.

' 1,653,076 c. c. WILSON STOP MECHANISM Filed Dec. 22, 195 3 Sheets-SheetZ Dec. 20, 192-7. 1,653,076

C. C. WILSON STOP MECHANISM Filed Dec. 22, 1925 3 Sheets-Sheet 3 Patented Ba. 20, 1927,.

CHARLES CLEVELAND wILsot oF KINGS MOUNTAIN, Non'rn oanomnmnssrsnon-on I ONE-THIRD TO PLATQD.-HER1\TDONAND ONE T-HIBD To BENNETITIA. SMITH;

sroi. MnoHAnIsniQ f Application filed TDeeember i Thevinvention relates to stop mechanisms particularlyadapted for stopping machines, however capable of general application, v where it is desired to impart apull upon 5 any object, for instance a belt shifter ora switch. i k c a 'A further object is to provide a stop mechanism particularlyadaptedfor use in connection with a machine an'dprovided with a 1 0 rotatable shaft, which is provided with a centrifugal. governor which controls longi-' tudlnal movement of'a stop, carrled by a,

large gearsecured toa rotatable "countershaft, and whichifcountershaft s mounted on a tiltable bracket, and upon loss of momentum of the rotatable shaft, the governor controlled member is moved out offregistr'af tion with the gear carried stops, thereb yal-' lowing the gear to mesh with a small plni'on 2 on the'rotatable shaft and the momentum of n i the rotatable shaft to impart rotation to the countershaft gear, Also to provide the countershaft with a cam cooperating with a stop and. spring, which normally maintain the 5 gears out of mesh and a nose gcarrledjby the spring and cooperating with the countershaft cam for allowing initial tilting of the pivoted bracket and meshingo'f the gear and pintle.

A further objectis to provide one-end of V the countershaft with a disc having an eccentrically mounted- "roller, which r0116? upon the rotation of the countershaft e n' gages a pivoted arm, to which a conne'ctlng rod is attached, therebyimparting'pull on the connecting rod for operating any desired mechanism, for instance a beltsh fter,

A further object is to provide means whereby upon a complete rotation oflthe countershaft, the countershaft bracket'will 40 be tilted away from the rotatable shaft'and the gear and pintle moved out of mesh.

A further object is toprovidea stop de vicefor use in connection with machinery generally, which stop device, upon loss of power on the machine,- will automatically shift the belt drive-or alswitch whichfcom trols the power to the machine too'fi position, thereby preventing the starting of the v I machine upon'resumption ofpower, and obi-H viating the present practice upon loss of power in a factory of shifting all the belts.

for driving the machinery to off positions so that it will not start the lmachinery' or various machines upon resumption of power.

Hth the above andother objects in view the invention resides: in the combination and arrangement ;of; parts ;as hereinafter set forth, shown inthe drawing, described and claimed, it being understoodthat changes in 1; the precise embodiment of thefinvention may be'made withinflthejscopeof .what is claimed 7 without departing from the spirit of the in-" vention. i '7 In thedrawingaQ; V Figure 1 's a topiplan View of the device. -F 1gure2 is an Jend View of the device, part being broken away to bettershowf the V structure, and showingthe parts in normal position, i 1 g I Q F'gure 3: is a vertical transverse sectional view taken v on 7 line 3 3 i of Figure 1. ,Referring to the drawing,th e numeral 1 designates Ithebase of the device which is adaptedtobe secured to a fiooror to a sup port adjacent a-machine, Extending up 'war dly; from the basew 1, adjacent one side there'of areliarms 2,1 1 Wi'fill'es of which aredisposed sleeves 3,", The sleeves S'ar'e securely held in the arms '2 by means of set screws4. Rotatably mounted in the sleeves 3' is driven shaft 5,\Ione end of which is. providedwith-a pulley 6, over which arbelt c is adapted to extend a'ndwhich belt isadapted to extend over a pulley of any 'kind on a i a driven portion "ofapiece of'machinery to be controlled,fhowever, any other kind of driving connection between the machine to be controlled andthe device maybefused,

Byproviding the sleeves 3, the shaft 5 and 7 which are provided WithweightS'lO; The

springs 9 have theirother ends secured to a 10 collar 11 which is, slidably mounted oni'the' driven shaft 5, and it will be seenwhen the driven shaft15 is rapidly rotated, the weights 10 will be forced outwardly by the centrifugal action, thereby movingl'the collar 11in the directionofthe arrow a,itheipurpose of which will presently appeari QS ecured on; the driven shaft' 5 is' a stop collar 12, which will limit the movement of the collar 11 in the direction ofthearr ow awhereb'y the stop 11o lug 13, carried-jbythe collar 11 will be prevented from" moving beyond registration with the stop finger 14 carried by thelarge gear 15, whichis secured to 'the tiltable 'counte'rshaft' 16... The stop lug .13 is cons:

trolled by the collar 11 and extends inwardly in a horizontal'plane from a yoke 17 disposed beneath the driven shaft 5, and inaseg nentally shaped channel 18; on which yoke the. 10

annular flange 19 of the collar-11 is rotatably mount-ed, there-fore it will be seen that when the collar 11 is moved in the direction of the arrow a, the yoke 17 will also move in said direction until the collar 11 engages the collar 12, and at which time the lug 13- will be in the path of the finger 14. of the 'large'gear 15, and in whichpositionlthe parts remain during the operation of the machine, to which the device is attached. Yoke 18 'is pivotally connected at 20 to a member 21, which memberis adjustably mounted on an arm 22 which is hingedly connected at 23 to an-arm 24, which armis attached to one of the supporting arms 2 at 25, therefore it will be seen that the arms 22and 24 will support the yoke 17 during its movement longitudinally in relation "to the" driven shaft 5, and the'hinged connec-' tion 23andpivotalc'onnection 20 will allow freedom of movement ofthe yoke. It is to be ,understood that'during the operation of a machine the drivenshaft 5 is continuously wardly'and inwardly said bracketwill tilt,

I extends upwardly from the base 1, and which arm prevents rotation of the shaft 16 and rotated'in the direction of the arrow 1) at all times, and when the machine to which the device isattached, has its power cut off for '7 any reason, for instance by blowing-out of a fuse,'the' mechanism hereinafter set forth is automatically operated as the speed. of rotation of the driven shaft 5 diminishes, which will relieve some of the centrifugal force of the weights 10 and will allow the springs 9 to straighten, consequently imparting longitudinal movement on the sleeve 19 and the yoke 17 in the direction of the arrow 0. I V

'Hingedly connecte'd'at 25 to ears26 carried by. the base 1' is an upwardly and inwardly inclined U-shapedbracket 27, in

bearings 28 0f the arms 29 onwhich is rotatably mounted the countershaft 16, and it will be I noted by inclining the bracket 27 upinwardly incident to gravity and incident to the position of the counterweight 15 carried by the gear 15, and which counterweight im arts' the initialrotation to the gear 15 a an the c'ountershaft 16 when the shaft '16 is released by the movement'of the stop'lug Mountedon the shaft 16 is a collar 30, which has one of its sides provided with a recess-31', in which recess is normally disposedan arm 32 carried by an arm 33, which gear 15 in one direction and insures the rotation of the shaft 16 in its proper direction. It will be noted that the gear 15 is disposed to one side of a drive pinion 34 carried by the driven shaft 5, and the countershaft 16 is positioned whereby when the bracket 27 tilts inwardly the gear 15 will mesh with the pinion 34. However the gear 15 is maintained normally out of mesh with the pinion 34 by means of an upwardly extending which is provided with a cam nose 36, the

lower end of which terminates in an inclinedportion 39, and under normal conditions when the drive shaft 5 is not rotating the ca1nnose 38 carried by a collar. 37 on the shaft 16 engages theupper end of the inclined surface 37 and forcesthe bracket 27 outwardly against its gravitational force. hen the parts are in the inoperative or normal position shown in Figure 2, and the driven shaft 5 is at rest, the lug 13 carried by the yoke 17 engages under thememb'er 39 carried by the gear 15,and which'member 39 is spaced below the member, 14 and in a vertical transverse plane closer to the gear 15. Upon the starting of a'machine, to which the device is belted, the shaft 5 is' rotated, and as the speed of rotation of the lug 38"downwardly and the spring arm 35 in combination with .the inclined surface 37 will .quicken the rotation of theshaft 16,

and at the same time the lug 38 will move below the surface 37 and the shoulder .40 of the collar 30 will cooperate with the rigid arm 32, and insure an inward tilting of the bracket 27 incident to gravity, but not to a point where the gear 15 will mesh with the pinion 34. It will be noted that during this movement, as the speed of rotation of. the

shaft 5 continues the lug 13 will be disposed leaf spring" 35, the upper end of r beneath the stop 14 carried by the gear 15,,

and at the same time, as longas'the machine to which the device. is attached, continues to rotate or operate, the gear 15. will be main-' tained out of mesh with the gear 34. This is the normal 'positionof the parts while the device is in. running connection with a ma chine. However if the machine to which the device is connected should stop operating, for instance upon loss of power wherethe machineis electrically driven, the shaft 5 will slow up in its rotation'which willv allow the springs 9 to straighten and force the lug 13 from beneath the member 14 carried by the wheel, thereby allowing the cam action of the shoulder 40' to'tilt the bracket 27 i nwardlyto a position where the 'gear will be lug "13 offthe slidableyoke '17; The above forced intomesh with the pinion-84 and the continued momentum of the driven shaft ,5

will cause'a complete rotation of the gear 15 until the member 39" ,1ga'in rests onthe operation or movement; of the lug 13 into the path of the member 39 is causedby the slowing up of the shaft 5' incidentto the member 39?. Just 1 before this operation takes "place the gears-lb' and 34 are moved out" of mesh by the outward tilting 'ofithe t g V 7 gear and cooperating with thev slidable meme ber foi'iholdingthe countershaft .g'ear nor malliy against rotationiandmeansawhereb'y-i U-shaped bracket 27 incidenttoithe engagement of the lug 38 with the member 36 car: ried by the spring a'rmand the balance of the rotation of the gear 15 'while.outofmesh is caused by the counterweight 15* carried by said gear '15. The parts are now in their initial position foragain starting and in the position shown in the drawing. In otherwords upon the starting of the rotation of the shaft 5 the centrifugal force of the governor will move the stop lug 13 into the path of the member 14 for allowing escape of the member 89 and as long as the proper centrifugal force is maintained the parts will remain in this positlon and upon dropping of the centrifugal force stop lug 13 will move towards the gear '15 above the stop member 89' thereby allowing the next operation of the device.

One end Pivotally cent the outer face of the disc 41 and belowthe roller 42, where said roller, during the complete rotation of the gear 15 will engage the upper side of the arm 44 and force the same downwardly. Pivotally connected at 45 to the outer side of the arm,44 is an upwardly extending connecting rod 46, which may be connected to a belt shifter for shifting a belt off a pulley or to a switch, and it is tobe understood that the main ldea involved at this point is to throwoff the operating means for the main machine so that upon resumptio'nof power in a shop," the machines will not start until a switch of the countershaft 16 is provided 7 with a disc 41 to one side'of-the axis of e which a roller 42 is mounted. connected at 43 to the base 1 is an upwardly nection with various kinds of machinery for moving or renderingtheJmachine inoperw simple in -con struction,.- positive in -its operation, and 5 maybe cheaply: manufactured' tive at, a certain period-and said devic-ecis v lppllcflble to" many: uses,- and thesame 1s v 1 The invention havingibeen-set forth is claiinedas new and useful is:.'-;

1., A stop 'm'echanism scompr-ising lia con stantly rotated drivenshaft,acountershaft,a v

tiltable bracket supporting the countershaft', I a slida-ble membercarried by the'drive'n'shaft,

governor I 11118111S" controlling. said -slidable member, a; gear carried by the driven shaft, a gearcarri'ediby the .countershaft and =nor= .mally out ofmesh -with the driven shaft ,1 Y

gear, a meinber carried by thecountershaft 2. The combinationwith a stop device comprising a constantly rotated shaft, a

t-iltable bracket, a countershaft carried by shaft, a gear carried by the driven-shaft,

a governor carried by the driven jshaft, a

slidable'yoke controlled by said governor,

spaced stops carried. by y the countershaft gearandwith which said yoke cooperates, a counter weight carried by the countershaft gear, said governor releasing the counterthe-bracket, argear carried by the counter- '95 said gears. being normally out-of 'm esh, of;

weight gear upon the slowing down ofth'e I driven shaft, a cam .lug carried by the countershaft, a spring arm extending-upwardly between the shafts, a" convexed surface car ried by the spring arm andwithwhich the cam lug engages, a cam carried by the countershaft, a stationary member disposed a'djacent said cam, saidcam forming means cooperating with the gear the pivoted bracket willbe allowed to tilt inwardly and the gears moved into mesh.

3. The combination with a stop'm echanism comprising a constantly rotated drive shaft, a countershaft, a tilted bracket in bearings of which the countershaft is mount- 1 ed, a'gea'r carriedbv the driven shaft, a gear carried by the countershaft, said gears being normally out of mesh, governor c'on trolled means carried by the driven shaft for holding the countershaft-gear against rotaprising cams carried by the countershaft, a

rigid arm to one side of the countershaft 110 stationary member v whereby upon release of the countershaft' and with which one "of the cams cooperates for. tilting the bracket inwardly,ya spring hgovernor carried by the driven shaft and.

arm disposed. at the apposite-side of the.

countershaft, a cam surface carried by said spring arm and with said cam surface one cam surface -.of. 'the' spring arm and the arm. 1

/ 4. A stop niechanisinof the character described comprising a constantly driven shaft, a countershaft, a gear carried by the driven shaft, a gear carried by the oountershaft, a

cooperating Withthe countershaft gear for holding the countershaft gear against rota tion and. also allowing rotation of said gear,

a counterweight carried by the countershaft gear and means cooperating with the counters'haft whereby upon release of the countel-shaft gear by the governor, said counter-, V

shaft will be moved towards the driven shaft and the gears meshed.

5., A stop mechamsm of the character .de scribed comprising a driven shaft, a icoun tershaft, a gear carried by the driven shaft, a gear carried by the counter-shaft, a gover' nor carried by the driven shaft, saidgov,

ernor'cooperating; with the gear carried the cou-ntershaftand holding said gear against rotation normally and allowing ro -f tation of said gear upon the loss of speed of rotation of the driven shaft, a counter- Weight carried by the gear of the countershaft, means cooperating with the countershaft whereby upon release of the counter a Y shaft gear by the governor, said gears will be moved into mesh, and means whereby after a rotation of the countershaft. gear said gears will be moved out of mesh. I x I a In testimony whereofl hereunto aflix my signature. h ,CHARLES CLEVELAND WILSON, 

